Metal deforming – By relatively movable offset tool-faces – With tool motion in fixed path
Patent
1994-05-20
1996-06-18
Jones, David
Metal deforming
By relatively movable offset tool-faces
With tool motion in fixed path
723918, 72 199, 29243523, B21J 1528
Patent
active
055266690
ABSTRACT:
A computer controlled pull gun system for pulling interference fit fasteners into a mounting hole. The pull gun has a rotatable and axially movable mandrel the is driven by a pneumatic motor. An axially movable piston in a hydraulic cylinder of the pull gun is attached to the mandrel to move it axially after it has been threaded into an interference fit fastener. A digital control system precisely controls the operation to the functions thread mandrel, pull mandrel, unthread mandrel to quickly and efficiently install a fastener. The digital control system controls pressurized fluid pneumatic and hydraulic valves to perform the installation functions. The digital controller responds to commands from buttons on the pull gun that select the functions and determines when a fastener has been properly installed by feedback from a pressure sensing transducer. A reset command button is provided on the pull gun to abort an installation or reset the pull gun for a new installation.
REFERENCES:
patent: 3181338 (1965-05-01), Zetterlund
patent: 3654792 (1972-04-01), Mead
patent: 4821555 (1989-04-01), Kamata et al.
patent: 5035129 (1991-07-01), Denham et al.
patent: 5152162 (1992-10-01), Ferraro et al.
patent: 5323946 (1994-06-01), O'Connor et al.
Gjovik Erik
Wiese David
Hi-Shear Corporation
Jones David
Mon Donald D.
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